Calculate A+B-C+D
Look at the series (7, 16, 43, B, A, 1096, 3283, 9844, 29527, C, 265723, D, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B-C+D!Correct answers: 19
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
Watch For Fallen Rocks
Driving down a remote road, a motorist sees a sign that says: "Watch For Fallen Rocks."
A couple of miles of careful driving later, he spots some pebbles and stops to pick a few up. Arriving in the next town, the motorist carries the stones into the highway maintenance office.
Placing them on the counter, he says to an official: "Here are your fallen rocks. Now where's my watch?"